I am receiving the following message at step 1 of 5

• The specified file temporary://mr_stefan_sheriden_2018-12-02_2018-12-06_3.csv could not be moved, because the destination is invalid. More information is available in the system log.
• Error moving file

Fixed, Thanks for reporting 

I am having same issue with all my files since one hour ago. Previously working fine

Fixed, we are investigating why this keeps coming back.

Automatically closed - issue fixed for 2 weeks with no activity.

This is happening again.

Fixed, thanks for flagging

I am having same issue with all my files since the past couple of hours. Previously it was working fine.

It's happening again just now.

Could you please fix? Thank you

Same thing is happening to me this evening.  Getting the message:

Select the CSV file (Step 1 of 5)

Error message

• The specified file temporary://activity_11_3.csv could not be moved, because the destination is invalid. More information is available in the system log.
• Error moving file

Please help.  

Thanks!

This has now been fixed, thanks for reporting